Balloon base



FIG. 1 is a top perspective view of a balloon base showing my newdesign;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is another top perspective view thereof showing a plug isdetached from the balloon base.

The broken line portions of the balloon base in FIGS. 1-9 representunclaimed portions of the claimed design and form no part thereof.

CLAIM The ornamental design for a balloon base, as shown and described.